CN212070404U - Three-layer main shaft device for boring machine - Google Patents
Three-layer main shaft device for boring machine Download PDFInfo
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- CN212070404U CN212070404U CN202020127372.1U CN202020127372U CN212070404U CN 212070404 U CN212070404 U CN 212070404U CN 202020127372 U CN202020127372 U CN 202020127372U CN 212070404 U CN212070404 U CN 212070404U
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- milling
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Abstract
The utility model provides a three-layer spindle unit is used to boring machine, including additional main shaft, milling shaft and boring spindle, wherein, additional main shaft sets up in the headstock through first bearing group, the milling shaft passes through second bearing group and sets up in the hole of additional main shaft, and the boring shaft then can also follow the axial motion of milling the axle through the guide key when milling the axle pivoted, compares in current two-layer main shaft structure, has improved spindle unit's bearing capacity, not only is applicable to big cutting force processing, can also guarantee the machining precision of little cutting force.
Description
Technical Field
The utility model belongs to the technical field of boring machine equipment and specifically relates to a three-layer spindle unit is used to boring machine.
Background
The boring machine is a main device for processing large box parts, and is a machine tool for boring the existing prefabricated holes of workpieces by using a boring cutter. Typically, the boring tool rotation is the primary motion and the boring tool or workpiece movement is the feed motion. The machine is mainly used for machining high-precision holes or finishing a plurality of holes by positioning once, can also be used for machining other machining surfaces related to hole finishing, and can be used for drilling, milling and cutting by using different cutters and accessories, wherein the machining precision and the surface quality are higher than those of a drilling machine.
The spindle device used by the existing boring machine is a two-layer spindle, and has the following defects:
(1) the external hanging accessories with larger specifications are not suitable to be fixedly installed, and the processing process range of the boring machine is limited;
(2) the external accessories are difficult to assemble and disassemble, the time consumption is long, and the processing efficiency is directly influenced;
(3) the rigidity of the two layers of main shafts is poor, the processing with large cutting force is not suitable, and the processing precision with small cutting force is relatively unstable.
Disclosure of Invention
In order to solve the problem, the utility model provides a three-layer spindle unit for boring machine.
The main contents of the utility model include:
a three-layer spindle device for a boring machine comprises an additional spindle, a milling spindle and a boring spindle, wherein the additional spindle is arranged in a spindle box through a first bearing group; the milling shaft is arranged in an inner hole of the additional main shaft through a second bearing group and is linked with a transmission mechanism in the main shaft box through a transmission gear; the boring shaft is nested in an inner hole of the milling shaft and rotates along with the rotation of the milling shaft, and the boring shaft moves back and forth in the inner hole of the milling shaft along the axial direction through a guide key; the end face of the boring shaft is provided with a cutter through hole, a broach mechanism and a cutter unloading device are arranged in the cutter through hole, a cutter seat is arranged on the front end face of the boring shaft, and the cutter seat is connected with the broach mechanism.
Preferably, a boring shaft taper hole is formed in the front end face of the boring shaft, the conical surface of the cutter seat is matched in the boring shaft taper hole, and the boring shaft taper hole is communicated with the cutter through hole; the broach mechanism comprises a pull nail and a pull claw, a nail rod of the pull nail is connected in an inner hole of the cutter seat, and the pull nail is connected with the pull claw.
Preferably, two main shaft end face keys are arranged on the edge of the front end face of the boring shaft, each main shaft end face key comprises a main shaft key groove and a main shaft key block arranged in the main shaft key groove, main shaft key holes are formed in the bottoms of the main shaft key blocks and the main shaft key grooves, and main shaft screws are arranged in the main shaft key holes; when the spindle key block is installed in the spindle key groove, the end face of one end, away from the spindle key groove, of the spindle key block has a first part exceeding the front end face of the boring shaft; the first portion is for aligning with a keyway of the tool holder.
Preferably, a fit clearance is formed between the outer peripheral surface of the boring shaft and the inner wall of the milling shaft, and a boring shaft sealing part is arranged in the fit clearance.
Preferably, the bore shaft sealing part is a labyrinth sealing structure.
Preferably, the first bearing group includes a first bearing a through which a front portion of the additional spindle is disposed in the head stock and a second bearing B through which a rear end of the additional spindle is disposed in the head stock.
Preferably, the additional spindle comprises a first body, a second body, a third body and a fourth body which are sequentially arranged from front to back, the outer diameter of the first body is larger than that of the second body, the outer diameter of the second body is larger than that of the third body, the outer diameter of the third body is larger than that of the fourth body, and the first bearing a is arranged on the second body; the first bearing B is arranged at one end, close to the fourth body, of the third body, and a first locking nut is arranged on the fourth body and used for fixing the first bearing B.
Preferably, the second bearing group comprises a second bearing a and a second bearing B, the milling shaft is arranged in front of the inner hole of the additional spindle through the second bearing a, and the milling shaft is arranged in the spindle box through the second bearing B and is located on the rear side of the transmission gear; and a second locking nut is arranged on the front side of the second bearing A, and a third locking nut is arranged on the rear side of the second bearing B.
Preferably, the second bearing a is an angular contact ball bearing, and the second bearing B is a deep groove ball bearing.
The beneficial effects of the utility model reside in that: the utility model provides a three-layer spindle unit is used to boring machine, the additional main shaft sets up in the headstock through first bearing group, the milling spindle passes through second bearing group and sets up in the hole of additional main shaft, and the boring spindle then can also follow the axial motion of milling spindle through the feather key along with milling spindle pivoted in, compares in current two-layer spindle structure, has improved spindle unit's bearing capacity, not only is applicable to big cutting force processing, can also guarantee the machining precision of little cutting force.
Drawings
FIG. 1 is a schematic view of the present invention mounted to a spindle head;
FIG. 2 is a schematic view of the overall structure of the present invention;
fig. 3 is a cross-sectional view a-a of fig. 2.
Detailed Description
The technical solution protected by the present invention will be specifically described below with reference to the accompanying drawings.
Please refer to fig. 1 to 3. The utility model provides a three-layer spindle unit 1 for boring machine installs on boring machine through headstock 2 to through the different cutter of 3 assembly of tool holder, can realize multiple functions such as turning, mill, bore hole, reaming, drilling, reaming, tapping, three-dimensional curved surface processing, be different from current spindle unit and only have two-layer structure, the utility model provides a spindle unit 1 is including additional main shaft 10, milling 20 and 30 three layer construction of boring axle.
In one embodiment, the additional spindle 10 is disposed in the spindle head 2 through a first bearing set; the milling shaft 20 is arranged in an inner hole of the additional main shaft 10 through a second bearing group; the boring shaft 30 is nested in the inner hole of the milling shaft 20 and rotates along with the rotation of the milling shaft 20, and meanwhile, the boring shaft 30 moves back and forth in the inner hole of the milling shaft 20 along the axial direction of the inner hole through a guide key 90; namely, the boring shaft 30 and the milling shaft 20 can synchronously rotate, the boring shaft 30 can move back and forth along the axial direction of the inner hole of the milling shaft 20, a transmission gear 21 is arranged on the milling shaft 20, and the transmission gear 21 is linked with a transmission mechanism in the main spindle box 2; the milling shaft 20 is supported and fixed in the additional main shaft 10 through the first bearing group, so that the milling shaft 20 and the boring shaft 30 rotate around the additional main shaft 10 and can also rotate simultaneously with the additional main shaft 10.
Specifically, the additional spindle 10 is precisely positioned and fixed on the spindle head 2 by the first bearing set, the first bearing set comprises a first bearing a 41 and a first bearing B42, the front part of the additional spindle 10 is arranged in the spindle head 2 by the first bearing a 41, and the rear end of the additional spindle 10 is arranged in the spindle head 2 by the first bearing B42.
Further, the additional spindle 10 includes a first body 101, a second body 102, a third body 103 and a fourth body 104 sequentially arranged from front to back, an outer diameter of the first body 101 is larger than an outer diameter of the second body 102, an outer diameter of the second body 102 is larger than an outer diameter of the third body 103, an outer diameter of the third body 103 is larger than an outer diameter of the fourth body 104, and the first bearing a 41 is disposed on the second body 102; the first bearing B42 is disposed at one end of the third body 103 close to the fourth body 104, and a first lock nut 43 is disposed on the fourth body 104 for fixing the first bearing B42.
Meanwhile, the milling shaft 20 is configured in the inner hole of the additional spindle 10 and the spindle box 2 through a second bearing set, and the rear end of the milling shaft 20 extends out of the inner hole of the additional spindle 10 and is configured with a transmission gear 21 on the extending part, so that transmission with a transmission mechanism in the spindle box is realized; specifically, the second bearing group comprises a second bearing a 51 and a second bearing B52, the milling shaft 20 is arranged in front of the inner hole of the additional spindle 10 through the second bearing a 51, and the milling shaft 20 is arranged in the spindle box 2 through the second bearing B52 and is located at the rear side of the transmission gear 21; a second lock nut 53 is disposed on the front side of the second bearing a 51, and a third lock nut 54 is disposed on the rear side of the second bearing B52.
Further, the second bearing a 51 is an angular contact ball bearing, and the second bearing B52 is a deep groove ball bearing.
In one embodiment, a tool through hole 300 is formed in an end surface of the boring shaft 30, and a broach mechanism and a tool removing device are disposed in the tool through hole 300, wherein the broach mechanism and the tool removing device may adopt existing devices, and are omitted in the drawings for more clearly showing the structure of the present application, but do not represent that the present application does not include these components.
Meanwhile, a cutter seat 3 is mounted on the front end face of the boring shaft 30, and the cutter seat 3 is connected with the broaching mechanism. Specifically, a boring shaft taper hole 310 is formed in the front end face of the boring shaft 30, the cutter holder 3 is in taper fit in the boring shaft taper hole 310, and the boring shaft taper hole 310 is communicated with the cutter through hole 300; the broach mechanism comprises a pull nail 32 and a pull claw 33, the nail rod of the pull nail 32 is connected in the inner hole of the cutter seat 3, and the pull nail 32 is connected with the pull claw 33.
In addition, two main shaft end face keys 70 are arranged on the edge of the front end face of the boring shaft 30, each main shaft end face key 70 comprises a main shaft key groove 701 and a main shaft key block 702 arranged in the main shaft key groove 701, main shaft key holes are formed in the bottoms of the main shaft key blocks 702 and the main shaft key grooves 701, and main shaft screws 703 are arranged in the main shaft key holes; so that when the spindle key block 702 is mounted in the spindle key groove 701, an end surface of the spindle key block 702 at an end remote from the spindle key groove 701 has a first portion exceeding a front end surface of the boring shaft 30; the first portion is used to align with the keyway 71 of the tool holder 3. Through main shaft terminal surface key 70 not only can realize the positioning action to tool holder 3, but also can pass through main shaft terminal surface key 70 transmission certain moment of torsion, guaranteed spindle unit's whole rigidity to a certain extent.
In one embodiment, a fit clearance is provided between the outer circumferential surface of the boring shaft 30 and the inner wall of the milling shaft 20, and a boring shaft sealing portion 80 is provided in the fit clearance; preferably, the bore shaft sealing portion 80 is a labyrinth sealing structure; the sealing performance of the boring shaft 30 and the milling shaft 20 is ensured.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. The three-layer spindle device for the boring machine is characterized by comprising an additional spindle, a milling spindle and a boring spindle, wherein the additional spindle is arranged in a spindle box through a first bearing group; the milling shaft is arranged in an inner hole of the additional main shaft through a second bearing group and is linked with a transmission mechanism in the main shaft box through a transmission gear; the boring shaft is nested in an inner hole of the milling shaft and rotates along with the rotation of the milling shaft, and the boring shaft moves back and forth in the inner hole of the milling shaft along the axial direction through a guide key; the end face of the boring shaft is provided with a cutter through hole, a broach mechanism and a cutter unloading device are arranged in the cutter through hole, a cutter seat is arranged on the front end face of the boring shaft, and the cutter seat is connected with the broach mechanism.
2. The three-layer spindle device for the boring machine as claimed in claim 1, wherein a boring spindle taper hole is formed in a front end surface of the boring spindle, the tool holder is taper-fitted in the boring spindle taper hole, and the boring spindle taper hole is communicated with the tool through hole; the broach mechanism comprises a pull nail and a pull claw, a nail rod of the pull nail is connected in an inner hole of the cutter seat, and the pull nail is connected with the pull claw.
3. The three-layer spindle device for the boring machine is characterized in that two spindle end face keys are arranged on the edge of the front end face of the boring spindle, each spindle end face key comprises a spindle key groove and a spindle key block arranged in the spindle key groove, spindle key holes are formed in the bottoms of the spindle key blocks and the spindle key grooves, and spindle screws are arranged in the spindle key holes; when the spindle key block is installed in the spindle key groove, the end face of one end, away from the spindle key groove, of the spindle key block has a first part exceeding the front end face of the boring shaft; the first portion is for aligning with a keyway of the tool holder.
4. The three-layer spindle device for the boring machine as claimed in claim 1, wherein a fit clearance is provided between an outer peripheral surface of the boring shaft and an inner wall of the milling shaft, and a bore shaft sealing portion is provided in the fit clearance.
5. The three-layer spindle device for the boring machine as claimed in claim 4, wherein the boring spindle sealing part is a labyrinth sealing structure.
6. The triple-layer spindle device for the boring machine as claimed in claim 1, wherein the first bearing group includes a first bearing a through which a front portion of the additional spindle is disposed in the spindle head and a second bearing B through which a rear end of the additional spindle is disposed in the spindle head.
7. The three-layer spindle device for the boring machine as claimed in claim 6, wherein the additional spindle comprises a first body, a second body, a third body and a fourth body arranged in sequence from front to back, the first body has an outer diameter larger than that of the second body, the second body has an outer diameter larger than that of the third body, the third body has an outer diameter larger than that of the fourth body, and the first bearing A is arranged on the second body; the first bearing B is arranged at one end, close to the fourth body, of the third body, and a first locking nut is arranged on the fourth body and used for fixing the first bearing B.
8. The triple-layer spindle device for the boring machine as claimed in claim 1, wherein the second bearing set comprises a second bearing A and a second bearing B, the milling spindle is arranged in front of the inner hole of the additional spindle through the second bearing A, and the milling spindle is arranged in the spindle box through the second bearing B and is positioned at the rear side of the transmission gear; and a second locking nut is arranged at the rear side of the second bearing B.
9. The three-layer spindle device for the boring mill as claimed in claim 8, wherein the second bearing A is an angular contact ball bearing, and the second bearing B is a deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020127372.1U CN212070404U (en) | 2020-01-20 | 2020-01-20 | Three-layer main shaft device for boring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020127372.1U CN212070404U (en) | 2020-01-20 | 2020-01-20 | Three-layer main shaft device for boring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212070404U true CN212070404U (en) | 2020-12-04 |
Family
ID=73570087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020127372.1U Active CN212070404U (en) | 2020-01-20 | 2020-01-20 | Three-layer main shaft device for boring machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212070404U (en) |
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2020
- 2020-01-20 CN CN202020127372.1U patent/CN212070404U/en active Active
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